What should you remember about ActionMode when using TBox Set Buffer?

• A. Always set ActionMode to 'Output'.
• B. Always leave ActionMode as 'Input' by default.
• C. Set ActionMode to 'Auto'.
• D. ActionMode is not relevant to buffers.

Answer: (B)

The setting here controls the direction of data flow between your test and the buffer. When ActionMode is set to Input, the buffer provides values to the application under test, which is the typical way we feed data into a test step. Keeping this as the default ensures a consistent, predictable data flow: you prepare data in the buffer and it is used by the test steps that follow.

If you were to use Output, the buffer would start capturing data coming from the system, which is useful for extracting results rather than supplying input data. Auto could switch modes based on context, but that can lead to unpredictable behavior and makes the test flow harder to follow. So, using Input by default aligns with the common practice of driving tests with predefined input data from the buffer.